==================================================================
BUG: KASAN: use-after-free in f2fs_evict_inode+0x100b/0x1330 fs/f2fs/inode.c:650
Read of size 4 at addr ffff88809c149d10 by task syz-executor.1/17456

CPU: 0 PID: 17456 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load4_noabort+0x88/0x90 mm/kasan/report.c:432
 f2fs_evict_inode+0x100b/0x1330 fs/f2fs/inode.c:650
 evict+0x2ed/0x760 fs/inode.c:559
 iput_final fs/inode.c:1555 [inline]
 iput+0x4f1/0x860 fs/inode.c:1581
 dentry_unlink_inode+0x265/0x320 fs/dcache.c:374
 __dentry_kill+0x3c0/0x640 fs/dcache.c:566
 dentry_kill+0xc4/0x510 fs/dcache.c:685
 shrink_dentry_list+0x2ab/0x6e0 fs/dcache.c:1092
 shrink_dcache_sb+0x144/0x220 fs/dcache.c:1212
 f2fs_fill_super+0x1461/0x7050 fs/f2fs/super.c:3225
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2492 [inline]
 do_mount+0x115c/0x2f50 fs/namespace.c:2822
 ksys_mount+0xcf/0x130 fs/namespace.c:3038
 __do_sys_mount fs/namespace.c:3052 [inline]
 __se_sys_mount fs/namespace.c:3049 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3049
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fbe4ab8e62a
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbe490fef88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000000054e6 RCX: 00007fbe4ab8e62a
RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fbe490fefe0
RBP: 00007fbe490ff020 R08: 00007fbe490ff020 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000040
R13: 0000000020000080 R14: 00007fbe490fefe0 R15: 00000000200000c0

Allocated by task 17456:
 kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 f2fs_fill_super+0xfd/0x7050 fs/f2fs/super.c:2821
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2492 [inline]
 do_mount+0x115c/0x2f50 fs/namespace.c:2822
 ksys_mount+0xcf/0x130 fs/namespace.c:3038
 __do_sys_mount fs/namespace.c:3052 [inline]
 __se_sys_mount fs/namespace.c:3049 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3049
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 17456:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 f2fs_fill_super+0x1439/0x7050 fs/f2fs/super.c:3220
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2492 [inline]
 do_mount+0x115c/0x2f50 fs/namespace.c:2822
 ksys_mount+0xcf/0x130 fs/namespace.c:3038
 __do_sys_mount fs/namespace.c:3052 [inline]
 __se_sys_mount fs/namespace.c:3049 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3049
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88809c148fc0
 which belongs to the cache kmalloc-8192 of size 8192
The buggy address is located 3408 bytes inside of
 8192-byte region [ffff88809c148fc0, ffff88809c14afc0)
The buggy address belongs to the page:
page:ffffea0002705200 count:1 mapcount:0 mapping:ffff88813bff2080 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea00023c9108 ffffea00027a7408 ffff88813bff2080
raw: 0000000000000000 ffff88809c148fc0 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809c149c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809c149c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88809c149d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff88809c149d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809c149e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
kauditd_printk_skb: 3 callbacks suppressed
audit: type=1804 audit(1676919076.044:14763): pid=17512 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir3692013051/syzkaller.FKcimU/238/bus" dev="sda1" ino=14387 res=1
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.